Reflections in a Plane Mirror

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  • 1. Reflections in a Plane Mirror
  • 2. Reflection in a Plane Mirror
  • 3. Activity 4.11
    How Light Reflects
  • 4. A
    B
  • 5. Law of Reflection:
    When light reflects off a surface, the angle of incidence is always equal to the angle of reflection
    i = r
  • 6. Looking in a mirror
  • 7. Looking in a mirror
  • 8. Looking in a mirror
  • 9. Object distance vs. Image Distance
  • 10. Ray Diagrams
    for reflections in a plane mirror
  • 11. Step 1
    Identify the top and the bottom of the object (label these “A” and “B”)
  • 12. Step 2
    Draw a line from point A that is perpendicular to the mirror
  • 13. Step 3
    Draw an incident ray (starting at point A)
    Draw a “normal” where the incident ray hits the mirror
    Use a protractor to draw a reflecting ray
    (Remember that i = r )
  • 14. Step 4
    Extend line A to point Ai (equidistant from point A on the other side of the mirror)
    Connect point Ai to your reflection ray
  • 15. Step 5
    Repeat steps 2-4 for Point B
  • 16. Try it!
  • 17. Activity D8
    Does a plane mirror reverse Left and Right?